Uplink Power Headroom Reporting for Overlapping UL Transmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing number of UEs and data volume in wireless communication systems necessitates a method to efficiently utilize limited radio resources for uplink and downlink data transmission, particularly in scenarios with overlapping uplink transmissions, to support various services with different requirements and reduce latency.
Innovation Solution
A method for determining a reference uplink transmission among overlapping transmissions based on priority, calculating a power headroom value, and transmitting a power headroom report (PHR) to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple uplink transmissions are performed simultaneously in overlapping time resources, then data throughput is improved, but power allocation complexity and interference increase
Solution Approach 1:
The patent changes the parameter of transmission power allocation by introducing priority-based power headroom reporting. Instead of treating all uplink transmissions equally, the system assigns different priorities to different UL transmissions and adjusts power allocation based on these priorities. The UE reports power headroom information for high-priority transmissions separately, enabling the gNB to make informed power allocation decisions that resolve conflicts between overlapping transmissions with different service requirements.
2Measurement precision
If power headroom reporting is performed for all overlapping uplink transmissions, then power allocation accuracy is improved, but signaling overhead and processing delay increase
Solution Approach 1:
The patent extracts only the necessary power headroom information from the set of all overlapping uplink transmissions. Instead of reporting PH for every UL transmission, the system identifies and reports only for high-priority transmissions (such as URLLC traffic). This selective extraction reduces the amount of reporting data while maintaining sufficient accuracy for power allocation decisions, thereby reducing signaling overhead and processing delay.
3Productivity
If reference uplink transmission is selected based on predetermined priority, then power headroom calculation efficiency is improved, but adaptability to dynamic service requirements decreases
Solution Approach 1:
The patent introduces dynamic priority assignment for uplink transmissions. Instead of using fixed predetermined priorities, the system can dynamically adjust the priority of different UL transmissions based on current service requirements, channel conditions, and QoS parameters. This allows the reference UL transmission selection to adapt to changing service demands while maintaining calculation efficiency through the established priority-based framework.
Data Source
AI summary
A UE determines a reference UL transmission from among a plurality of UL transmissions on the basis of i) power headroom reporting being triggered and ii) the plurality of UL transmissions overlapping in time on a serving cell of the UE with respect to UL transmission time, calculates a PH value for the serving cell on the basis of the reference UL transmission, and transmits the PHR including the PH value. The determining of the reference UL transmission from among the plurality of UL transmissions may include determining a UL transmission having a predetermined priority among the plurality of UL transmissions as the reference UL transmission.